用codeigniter中生成的pdf发送邮件

composer require tecnickcom/tcpdf

<?php
defined('BASEPATH') OR exit('No direct script access allowed');

use TCPDF;

class Pdf extends CI_Controller {

    public function generate_pdf() {
        $pdf = new TCPDF(PDF_PAGE_ORIENTATION, PDF_UNIT, PDF_PAGE_FORMAT, true, 'UTF-8', false);

        // 设置文档信息
        $pdf->SetCreator(PDF_CREATOR);
        $pdf->SetAuthor('Your Name');
        $pdf->SetTitle('Sample PDF');
        $pdf->SetSubject('Sample PDF');
        $pdf->SetKeywords('TCPDF, PDF, example, test, guide');

        // 设置页眉和页脚
        $pdf->setHeaderData('', 0, 'Sample PDF', '');
        $pdf->setFooterData(array(0,64,0), array(0,64,128));

        // 设置默认字体
        $pdf->SetFont('helvetica', '', 12);

        // 添加一个页面
        $pdf->AddPage();

        // 写入一些HTML内容
        $html = '<h1>Hello World</h1><p>This is a sample PDF generated using TCPDF.</p>';
        $pdf->writeHTML($html, true, false, true, false, '');

        // 输出PDF到浏览器
        $pdf->Output('example.pdf', 'F'); // 保存到文件
    }

    public function send_email_with_pdf() {
        $this->generate_pdf();

        $config = array(
            'protocol' => 'smtp',
            'smtp_host' => 'smtp.example.com',
            'smtp_port' => 587,
            'smtp_user' => 'your_email@example.com',
            'smtp_pass' => 'your_password',
            'mailtype' => 'html',
            'charset' => 'utf-8',
            'wordwrap' => TRUE
        );

        $this->load->library('email', $config);
        $this->email->set_newline("\r\n");

        $this->email->from('your_email@example.com', 'Your Name');
        $this->email->to('recipient@example.com');
        $this->email->subject('Sample PDF Email');

        $file_path = './uploads/example.pdf';
        $this->email->attach($file_path);

        $this->email->message('Please find attached the sample PDF.');

        if ($this->email->send()) {
            echo 'Email sent successfully!';
        } else {
            echo $this->email->print_debugger();
        }
    }
}